The major types, metallogenesis of platinum-group element deposits and some prospects

	The major types, metallogenesis of platinum-group element deposits and some prospects
	Tang DongMei 1,2; Qin KeZhang 1; Liu BingGuang 1; Sun He 1,2; Li JinXiang 1,2
刊名	ACTA PETROLOGICA SINICA
	2008-03-01
卷号	24 期号:3 页码:569-588
关键词	platinum-group elements mineralization type magmatic Cu-Ni sulfide ore deposit sulphur saturation potential orientation
ISSN号	1000-0569
文献子类	Review
英文摘要	The study of Platinum-Group Element (PGE) deposits has got important achievements in recent decades. PGE can be hosted in different type rocks, formed in different epochs, PGE deposits can be related to different types of magma and hydrothermal activities. The ore-forming condition of PGE is also special due to their particular chemical characteristics such as stable chemical behavior and refractory of common acid and alkali solutions. The paper suggested a systemic classification of four types and nine subtypes for PGE mineralization. Four major types of PGE deposit include magmatic type, hydrothermal type, volcanic massive sulfide (VMS) type and exogenous type. Magmatic-related PGE deposits can be further divided into Cu-Ni sulfide sub-type, chromite sub-type and magnetite sub-type. Hydrothermal-related PGE deposits contain porphyry Cu-Au sub-type and skarn Cu-Fe-Au sub-type. Exogenic-related PGE deposits can be divided into black shale-hosted PGE deposit and placer PGE deposit. And then we discussed the basic characteristics and enrichment regularity of all kinds of PGE deposits one by one. However, the genesis of PGE deposits is still in debate. Although there are several kinds of models, the saturation of S and fractionation of sulfide at the process of magma rising into the upper curst play an important role for PGE enrichment. With the evolution of magma, the following factors will eventually drive a sulfur-undersaturated magma to sulfur saturation: (i) fractionation of silicates and oxides; (ii) fractionation of Fe-rich minerals ( notably olivine, pyroxene, chromite and magnetite); (iii) contamination of the magma; (iv) mixing of composition ally contrasting, sulfur undersaturated, magmas could trigger sulfur supersaturation. Once an immiscible sulfide melt has formed it needs to be concentrated so that the sulfides can be mined economically. Temperature, content of metal (Ni and Cu), other components in the system and fs(2) also the factors controlled the ore formation. Primary magmatic PGE mineralization show a low-temperature hydrothermal overprint, but relatively few cases have so far been documented where hydrothermal processes are the only or main factors responsible for PGE concentration. At last, the paper discussed the main problems for PGE study, such as origin and ore-forming conditions for PGE, partition regularity of PGE during the evolution of magma, the occurrence of platinum-group minerals (PGM) in the deposits and suggested some potential orientations, and further suggested that Tibet (ophiolite chromite sub-type and subduction-accretion arc porphyry Cu-Au sub-type) and Xinjiang (postcollisional Permian mafic-ultramafic Cu-Ni sulfide sub-type and black shale sub-type) are the most potential areas for PGE exploration in China.
WOS关键词	MASSIVE SULFIDE DEPOSITS ; PGE-AU MINERALIZATION ; CAMBRIAN BLACK SHALES ; MONOSULFIDE SOLID-SOLUTION ; CONTINENTAL FLOOD BASALTS ; PORPHYRY COPPER-DEPOSITS ; SUDBURY IGNEOUS COMPLEX ; ORE-BEARING INTRUSIONS ; OS ISOTOPIC EVIDENCE ; J-M REEF
WOS研究方向	Geology
语种	英语
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000259117700017
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/69096]
专题	中国科学院地质与地球物理研究所
通讯作者	Tang DongMei
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Tang DongMei,Qin KeZhang,Liu BingGuang,et al. The major types, metallogenesis of platinum-group element deposits and some prospects[J]. ACTA PETROLOGICA SINICA,2008,24(3):569-588.
APA	Tang DongMei,Qin KeZhang,Liu BingGuang,Sun He,&Li JinXiang.(2008).The major types, metallogenesis of platinum-group element deposits and some prospects.ACTA PETROLOGICA SINICA,24(3),569-588.
MLA	Tang DongMei,et al."The major types, metallogenesis of platinum-group element deposits and some prospects".ACTA PETROLOGICA SINICA 24.3(2008):569-588.